<b>NaCl and <i>Phaeomoniella chlamydospora</i> affect differently starch and sucrose metabolism in grapevines</b> - doi: 10.4025/actasciagron.v35i2.15690

  • Helena Oliveira Universidade de Aveiro
  • Armando Costa Universidade de Aveiro
  • Conceição Santos Universidade de Aveiro
Palavras-chave: grapevine, Phaeomoniella chlamydospora, salt stress, starch metabolism, amylase, sucrose metabolism

Resumo

Vineyards production is often affected by diseases as esca and Petri disease and by excess of salt. Phaeomoniella chlamydospora is one of the pathogenic fungi associated to esca disease, but its interaction with the plant under excess of salt remains unknown. Under controlled in vitro conditions, Vitis vinifera L. plants were exposed to 0, 20 and 100 mM NaCl and inoculated with P. chlamydospora. Both inoculation and salt stress decreased the levels of chlorophylls, which was aggravated when both factors were combined. NaCl 100 mM and, mostly, inoculation, decreased maximum fluorescence (Fm), variable fluorescence (Fv) and Fv/Fm. The activity of a-amylase decreased in plants exposed to 100 mM or inoculated but no synergic effect of these factors was observed; the activity of sucrose synthase was inhibited only by inoculations, whereas invertase was stimulated at 20 mM, but decreased with inoculation. Data support that both excess of salt and fungi inoculation negatively affect photosynthesis and sucrose metabolism, and that they also decrease amylase activity, which may play an important role in the increased levels of starch found in inoculated plants.

 

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Biografia do Autor

Helena Oliveira, Universidade de Aveiro
investigadora de pos doutoramento, responsavel laboratorial de citometria de fluxo, investigadora do CESAM
Armando Costa, Universidade de Aveiro

Engenheiro Agronomo, tecnico superior de agronomia no departamento de biologia

 

Conceição Santos, Universidade de Aveiro
Professor associado com agregação no Departamento de Biologia da Universidade de Aveiro, Investigador senior do CESAM, consultor da Klon Co, Avaliador de projetos na Uniao Europeia. Especialidade e interesses: biologia celular e resposta a stress; fitopatologia; citomica e metabolomica; gene expresison, fitocompostos e toxicidade
Publicado
2012-12-20
Como Citar
Oliveira, H., Costa, A., & Santos, C. (2012). <b>NaCl and <i>Phaeomoniella chlamydospora</i> affect differently starch and sucrose metabolism in grapevines</b&gt; - doi: 10.4025/actasciagron.v35i2.15690. Acta Scientiarum. Agronomy, 35(2), 153-159. https://doi.org/10.4025/actasciagron.v35i2.15690
Seção
Fitossanidade

 

2.0
2019CiteScore
 
 
60th percentile
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2.0
2019CiteScore
 
 
60th percentile
Powered by  Scopus